An illustrative example method of monitoring value added activity includes positioning a detector near a selected portion of a machine using a clip for situating the detector in a position where the detector can detect at least one electrical characteristic associated with operation of a machine; communicating an indication of the detected electrical characteristic between the detector and a user interface; and displaying a visual representation of value added activity information based the indication. The value added activity corresponds to human operator performance that is distinct from machine performance during a manufacturing or assembly process.